<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model.trim="name" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model.number="age" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="gender">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="fn(flag)">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item, index) in list" :key="item.id">
          <td>{{ index + 1 }}</td>
          <td>{{ item.uname }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.sex }}</td>
          <td>
            <button @click="del(item.id)">删除</button>
            <button @click="edit(item.id)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      name: '',
      age: '',
      gender: '',
      list: [
        { id: 1, uname: 'Tom', age: 16, sex: '男' },
        { id: 2, uname: 'Jone', age: 21, sex: '女' },
      ],
      flag: false,
    }
  },
  methods: {
    fn(flag) {
      console.log(this.gender);
      if (!this.name) return alert('请输入姓名')
      if (!this.age) return alert('请输入年龄')
      if(!this.gender) return alert('请输入性别')
      if (flag) {
        const newObj = this.list.find((item) => item.uname === this.name)
        newObj.uname = this.name
        newObj.age = this.age
        newObj.sex = this.gender
      } else {
        this.list.push({
          id: +new Date(),
          uname: this.name,
          age: this.age,
          sex: this.gender,
        })
      }
    },
    edit(id) {
      this.flag = !this.flag
      console.log(this.flag)
      const newDate = this.list.find((item) => item.id === id)
      this.name = newDate.uname
      this.age = newDate.age
      this.gender = newDate.sex
    },
    del(id){
      this.list=this.list.filter(item=>item.id!==id)
    }
  },
}
</script>

<style></style>
